Revolving holder machine tool



Sept. 29, 1931. G. E. HALLENBECK REVOLVING HOLDER MACHINE TQOL Filed May 24, 1926 s Sheets-Sheet 1 m m a To, 7 f 7a PM.I.. 5 H0 2 \I/ \4. A Hy/GU R i WU 7 m m a TI'EIiNiY Sept. 29, 1931.

Filed, May 24, 1925 3 Sheets-Sheet 2 p 1931- G. E. HALLENBECK 1,825,060

REVOLVING HOLDER MACHINE TOOL Filed May 24, 1926 3 Sheets-Sheet 3 Patented Sept. 29.1931

ounces-rares- PATENT oF IcE GEORGE ,E. HALLE'NBEGK, oii'f'ronnno, 01110, ASSIGNOR TO BAKER BROTHERS, INC, on

. ,ToLEnqoHIo, A CORPORATION on orrro or tool;

I mvommnmm MACHINE 'roor.

Application filed; May 2 4,

This invention relates to machine, tools for facing ordressing a surface. r

This invention has utility when embodied in a tool of the drill pressor spindletype.

Referring to the drawings:

' Fig. 1 shows an embodiment of theinvention, with parts broken away, as adapted to a vertical drill press type of machine Fig.2 is a perspective view on' a small scale of an article of work which may be economically handled in an embodiment as herein disclosed;

Fig. 3 is a view of the revolving holder mechanism or device fromthe right of Fig. 1- g 1 g Fig. 4 is a-section on-the' line IVIV, Fig. 1, looking in the direction of the arrow;

5 is a section on the line V-,-V, Fig.

1, looking in the direction of the arrow; Fig. 6 is a section on the line VI-VI, Fig. 1, looking in the direction of the arrow Fig. 7 is a section ont the line VIIVII, Fig. 1 looking in the direction onthe arrow; a n

Fig. 8 is a section on the line VIIIVIII, Fig. 4, looking in the direction of: the arrow; n Fig. 9 is a section. on the line IX-IX, Fig. 4; and

Fig. 10is a detail view showing the posi'- tion of the cutting tool as to the work;

' Base 1 is shown ashaving column 2 carrying adjustable work table 3. On the column 2 is mounted, frame overhang 4. Driving pulley 5 on shaft 6 operating-through gear wheels 7, 8, 9, as atrain, and shaft 10having bevel gear 11 in mesh with bevel pinion 12 serves to rotateupright shaft 13. This shaft 13 carriespinion 14in mesh with'gear 15 splined on spindle lfi carrying collar 17 sustained bybearing 18; "Additional bear ing 19 is effective for taking work thrust.

from the spindle 16 to the overhang 4 of the main frame of this drillpress; This bearing 19 isfadjacent shoulder 20 of the spindle 16. From this shoulder 2O enlarged diameter portion 21 ofthe spindle 16 is provided with'a seat .22,for guidestem 23 1926. Serial R... 111,160;

which may be anchored with this enlargement '21 of the drill spindle by key 24. Way'25 through this enlargement'21 permits insertion of a tool forremoval of this guide extension 23.

Sleeve 26 about the spindle 16, adjacent the bearing 19, is splined in'the frame 4, and has anchored thereto by set screw 27, worm 28 as extendingabout the spindle 16. By key 29 there 'is mounted on the"enlargement 21 of the drill spindle 16, housing 30 providing bearing 31 (Fig. '4).- In this hearing 31 and extending tangentially as to thefspindle' 16, thereis shaft 32 carrying worm wheel 33 in mesh with the worm 28. a

On the opposite side of this worm wheel 33 from the-bearing 31, this shaft 32 has thrust bearing 34 spac'in'g the worm wheel 33 from bevel pinion 35 in mesh with bevel pinion 36 on' shaft 37 parallel to the axis of the. spindle 16. Thisshaft. 37 is mounted in bearing 38 of the frame 30 and as downwardly extending from the bevel pinion 36 carries pinion 39 in meshwith gear'40 as embracing the enlargement21 of thespindle 16 and relatively rotatable. Bolts 41 serve to anchor to this gear 40, cam 42 on the side of the gear more remote from the worm 28.- This cam 42 has gradual increase in radiusportion 43 (Fig. 6) with an abrupt decrease in radius portion 44 between the extremes ofthe portion 43. There is accordingly,in this disclosure the" stationary worm 28 as an actuator effective through the speed reduction during rotation of the spindle 16 to effect a relatively slower speed of rotation of the cam 42.

Coacting with the'cam 42 is roller 45 carried by arm46 fast on shaft 47, as a fulcrum, mounted-in. bearings48, 49, (Fig. 9),

in housing extension 50 of the frame 30..

Fixed withthis shaft'47is arm 51 having seat 52 (Fig. 7,) as a holder, mounting cutting too1'53 as held in adjustable position therein by set screw 54. This cutting tool 53lis of the point orsingle edge cutting type of cutter.

as distinguished from a sweep face type.

The arm .51 beyond the holder portion I has a pivot pin: 55 engaging link 56 extending loosely through guide 57 (Figs. 7, 9). Compression helical spring 58 coacts between the guide 57 and shoulder 59 adjacent the pivot pin 55 on the link 56 thereby normally maintaining the arm 51 rocked into radially remote position; as tothe spindle axis and away from the extension 23; Accordingly,

. from the revolving housingror firameBO.

The housing 30, opposite the flange 63 as to: the shaft 47, carries flange 64as arest opposing the hol'der arm 51. The position of the cutter 53' and. the direction of rotation of the spindle 16,.herein: shown as clockwise as looking down on the work, is such that the tool ispulled into the work instead of pushed into the work by the relativeclock wise movement of the cant 42 as effecting larger diameter of cutting action of the tool as the work progresses. The cam is designed as herein to have the radial throw action upon the tool suflicient to face the article of work. I V As herein shown the article of work' is rear' axle housing 65 having region 66 to-be machined off or faced. The work, 65- is anchored by holder 67 with the work table 31 The tool at the starting of the work. is dis"- posed in: the region of central opening 68 of' the work 65. the machine tool is Uperatedl it progresses radially outward in dressing the face 66 until clear of such face 66'. Then the tool 53 reaches theport-ion 44 of thecam and is automatically reset for a repetition of alike dressing operation on another article of work or repetition on the same article of work. This re-facing may be for a more shallow cut or a stage of cutting; Accordingly, the distance between the travel or revolution plane of the tool 53 and the work may be adjusted as to the position of. the spindle 16- and the table 8. This is conveniently accomplished by adjusting the table 3 by means of a crank 69 or adjusting the spindle sleeve 26by rotating'hand wheel 26'. The frame 30 as enveloping the speed transmission reduction for the cam drive,

has the lower portion thereof closed by plate 70 mountedwifth the frame 30 by bolts 71. ThisplateZO has central opening 72 through which'the' extension 23' extends as stifiening' guide and nut 73 about this guide 23 coacts with? washer 74 abutting this plate 0 to stiffen this:revolving-feed: and t'ool carrier mechanism.

r This" type of holder drive is effective for high speed of rotation with a desired adjust-- ment of progress or radial travel: over a as selected; This type ofcutting tool may have a; rapid speed with aminimumof Herein the work isanchored to the table 7 by;holder 67, thereby providing a ring portion 66 located coaxial with the spindle 1%6 extent. the operati'onhereunder; the work is th-us 'anchored and the tool rotates .with the spindle. and is gradually fed across the face 66." This rotation of the tool 59 is dueto-thetool being anchored with the housing 30 fixed with the spindle 16. There is relative rotation of the. tool as to. cam 42? as driven from the worm gearing 28,. 83', and: bevel gearing 36,. 37,. efiecting shifting of cam- 42- against which acts roller 45 on arm 46 fixed with shaft 47 thereby shifting, the arm 51 carrying the: tool 53 in. bringing about. the dressing of the face 66 in a plane, which plane is perpendicular to the axis of rotation for the carrier for the tool.

What is claimed and itzis desired to secure by Uni-tedStates Letters Patent is z.-

= 1. A machine tool. comprising a. frame, a,

rotary spindle protruding from said: frame, a; tool holder, a tool mounted in the holder,

a'rnarm: mounting the holder, a bearing for:

the arm parallel to and eccentric of said spindle axis, and meansaf'or rocking thearm includinga cam about the-spindle, and an actuator for shifting' the: cam angularlyaas to the spindle.

2. A machine tool comprising a frame, a rotary spindle protruding; from said frame, a tool holder, a tool mounted in the holder, arnr mounting the: holder, a bearing, for the arm parallel. to and eccentric to said spindle axis, and means for rocking the. arm including a cam. about the spindle, mechanism for shiftingthecam as to the spindle embodying a stationary element, and gearcarried by the spindle actuated by said element. 3.. A revolving holder for a tool, a transverse: actuator for the holder embodyingan arm mounting the holder, a'tool' mounted in the holder for rotation with the holder, a bearing for the arm parallel to the axis of revolution of the holder, yield'able means re sisting shifting of the holder radially out-, ward, a cam resisting theyieldable means for maintaining eccentricity ofthe holder, gearing rotatable with the holder for relatively rotating the cam and including .a

worm wheel, and a stationary worm for ac 'tuatlng the. WOllllWhGQl.

.4. A tool holder attachment for a rotary spindle comprising an adjustable lever, a fulcrum for the lever parallel to the spindle axis,.'an-dcontrol means. operable from the spindlefor varying the. radial working lposition of the lever as to the axis of the" spin dle during spindle rotation. V V

5. A tool holder attachmentfor a rotary spindle comprising an adjustable lever, a 5 fulcrum for the leverparallel to the spindle c axis, and control means for positioning the lever for varying eccentricity of the tool by rocking said lever on itsaxis transverse- 1y of the spindle axis.

6. A toolholder attachment'for a rotary spindle comprising an adjustable lever, a fulcrum for the lever parallel to the spindle axis, and control means for positioning the lever for varying eccentricity of the tool,

said control means including a cam.

In Witness whereof I affix my signature.

GEO; E. HALLENBECKh 

